Disinfection byproducts · 2024
TTHM in Pittsburgh, PA tap water
Pittsburgh, PA's 2024 Consumer Confidence Report shows TTHM at or above the federal limit. Measured value is 1.5× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 17–119 ug/L | None set |
Reported level System-wide | 54 ug/L | None set |
Verbatim from Pittsburgh, PA's 2024 Consumer Confidence Report — source document ↗
About TTHM
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
People also ask
+Is there TTHM in Pittsburgh, PA tap water?
Yes — Pittsburgh, PA's 2024 Consumer Confidence Report lists TTHM at 17–119 ug/L. Pittsburgh, PA's 2024 Consumer Confidence Report shows TTHM at or above the federal limit. Measured value is 1.5× the threshold.
+What's the federal limit for TTHM in drinking water?
The EPA has not set an enforceable federal limit for TTHM. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is TTHM?
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
+Where does this TTHM measurement come from?
This page reproduces the TTHM entry from the 2024 Consumer Confidence Report published by the Pittsburgh, PA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/pa/pittsburgh/2024/source.